======================================================
WARNING: possible circular locking dependency detected
6.2.0-rc8-syzkaller-00002-gb408817d4884 #0 Not tainted
------------------------------------------------------
syz-executor.0/21347 is trying to acquire lock:
ffffffff8e0d5fa8 (rtnl_mutex){+.+.}-{3:3}, at: prb_calc_retire_blk_tmo+0x7d/0x1e0 net/packet/af_packet.c:576
but task is already holding lock:
ffff8880446c6130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1725 [inline]
ffff8880446c6130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_setsockopt+0x155/0x3a30 net/packet/af_packet.c:3791
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (sk_lock-AF_PACKET){+.+.}-{0:0}:
lock_sock_nested+0x3a/0xf0 net/core/sock.c:3471
lock_sock include/net/sock.h:1725 [inline]
l2tp_tunnel_register+0x2aa/0x11e0 net/l2tp/l2tp_core.c:1483
pppol2tp_connect+0xcdc/0x1a10 net/l2tp/l2tp_ppp.c:723
__sys_connect_file+0x153/0x1a0 net/socket.c:1976
__sys_connect+0x165/0x1a0 net/socket.c:1993
__do_sys_connect net/socket.c:2003 [inline]
__se_sys_connect net/socket.c:2000 [inline]
__ia32_sys_connect+0x72/0xb0 net/socket.c:2000
do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
__do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x70/0x82
-> #2 (sk_lock-AF_PPPOX){+.+.}-{0:0}:
lock_sock_nested+0x3a/0xf0 net/core/sock.c:3471
lock_sock include/net/sock.h:1725 [inline]
pppoe_flush_dev drivers/net/ppp/pppoe.c:304 [inline]
pppoe_device_event+0x329/0x980 drivers/net/ppp/pppoe.c:346
notifier_call_chain+0xb5/0x200 kernel/notifier.c:87
call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1944
call_netdevice_notifiers_extack net/core/dev.c:1982 [inline]
call_netdevice_notifiers net/core/dev.c:1996 [inline]
dev_set_mac_address+0x2d7/0x3e0 net/core/dev.c:8791
bond_set_mac_address+0x359/0x7a0 drivers/net/bonding/bond_main.c:4743
dev_set_mac_address+0x26b/0x3e0 net/core/dev.c:8787
dev_set_mac_address_user+0x31/0x50 net/core/dev.c:8805
do_setlink+0x18c4/0x3bb0 net/core/rtnetlink.c:2775
__rtnl_newlink+0xd69/0x1840 net/core/rtnetlink.c:3590
rtnl_newlink+0x68/0xa0 net/core/rtnetlink.c:3637
rtnetlink_rcv_msg+0x43e/0xca0 net/core/rtnetlink.c:6141
netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2574
netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365
netlink_sendmsg+0x91b/0xe10 net/netlink/af_netlink.c:1942
sock_sendmsg_nosec net/socket.c:714 [inline]
sock_sendmsg+0xd3/0x120 net/socket.c:734
____sys_sendmsg+0x712/0x8c0 net/socket.c:2476
___sys_sendmsg+0x110/0x1b0 net/socket.c:2530
__sys_sendmsg+0xf7/0x1c0 net/socket.c:2559
do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
__do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x70/0x82
-> #1 (dev_addr_sem){++++}-{3:3}:
down_write+0x94/0x220 kernel/locking/rwsem.c:1562
dev_set_mac_address_user+0x23/0x50 net/core/dev.c:8804
do_setlink+0x18c4/0x3bb0 net/core/rtnetlink.c:2775
__rtnl_newlink+0xd69/0x1840 net/core/rtnetlink.c:3590
rtnl_newlink+0x68/0xa0 net/core/rtnetlink.c:3637
rtnetlink_rcv_msg+0x43e/0xca0 net/core/rtnetlink.c:6141
netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2574
netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365
netlink_sendmsg+0x91b/0xe10 net/netlink/af_netlink.c:1942
sock_sendmsg_nosec net/socket.c:714 [inline]
sock_sendmsg+0xd3/0x120 net/socket.c:734
__sys_sendto+0x23a/0x340 net/socket.c:2117
__do_compat_sys_socketcall+0x62e/0x720 net/compat.c:474
do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
__do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x70/0x82
-> #0 (rtnl_mutex){+.+.}-{3:3}:
check_prev_add kernel/locking/lockdep.c:3097 [inline]
check_prevs_add kernel/locking/lockdep.c:3216 [inline]
validate_chain kernel/locking/lockdep.c:3831 [inline]
__lock_acquire+0x2a43/0x56d0 kernel/locking/lockdep.c:5055
lock_acquire kernel/locking/lockdep.c:5668 [inline]
lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633
__mutex_lock_common kernel/locking/mutex.c:603 [inline]
__mutex_lock+0x12f/0x1360 kernel/locking/mutex.c:747
prb_calc_retire_blk_tmo+0x7d/0x1e0 net/packet/af_packet.c:576
init_prb_bdqc net/packet/af_packet.c:634 [inline]
packet_set_ring+0x158f/0x1980 net/packet/af_packet.c:4439
packet_setsockopt+0x1a32/0x3a30 net/packet/af_packet.c:3808
__sys_setsockopt+0x2c6/0x5b0 net/socket.c:2246
__do_sys_setsockopt net/socket.c:2257 [inline]
__se_sys_setsockopt net/socket.c:2254 [inline]
__ia32_sys_setsockopt+0xbd/0x150 net/socket.c:2254
do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
__do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x70/0x82
other info that might help us debug this:
Chain exists of:
rtnl_mutex --> sk_lock-AF_PPPOX --> sk_lock-AF_PACKET
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(sk_lock-AF_PACKET);
lock(sk_lock-AF_PPPOX);
lock(sk_lock-AF_PACKET);
lock(rtnl_mutex);
*** DEADLOCK ***
1 lock held by syz-executor.0/21347:
#0: ffff8880446c6130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1725 [inline]
#0: ffff8880446c6130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_setsockopt+0x155/0x3a30 net/packet/af_packet.c:3791
stack backtrace:
CPU: 0 PID: 21347 Comm: syz-executor.0 Not tainted 6.2.0-rc8-syzkaller-00002-gb408817d4884 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
check_noncircular+0x25f/0x2e0 kernel/locking/lockdep.c:2177
check_prev_add kernel/locking/lockdep.c:3097 [inline]
check_prevs_add kernel/locking/lockdep.c:3216 [inline]
validate_chain kernel/locking/lockdep.c:3831 [inline]
__lock_acquire+0x2a43/0x56d0 kernel/locking/lockdep.c:5055
lock_acquire kernel/locking/lockdep.c:5668 [inline]
lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633
__mutex_lock_common kernel/locking/mutex.c:603 [inline]
__mutex_lock+0x12f/0x1360 kernel/locking/mutex.c:747
prb_calc_retire_blk_tmo+0x7d/0x1e0 net/packet/af_packet.c:576
init_prb_bdqc net/packet/af_packet.c:634 [inline]
packet_set_ring+0x158f/0x1980 net/packet/af_packet.c:4439
packet_setsockopt+0x1a32/0x3a30 net/packet/af_packet.c:3808
__sys_setsockopt+0x2c6/0x5b0 net/socket.c:2246
__do_sys_setsockopt net/socket.c:2257 [inline]
__se_sys_setsockopt net/socket.c:2254 [inline]
__ia32_sys_setsockopt+0xbd/0x150 net/socket.c:2254
do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
__do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x70/0x82
RIP: 0023:0xf7f99549
Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f7f525cc EFLAGS: 00000296 ORIG_RAX: 000000000000016e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000000107
RDX: 0000000000000005 RSI: 00000000200000c0 RDI: 000000000000001c
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
----------------
Code disassembly (best guess):
0: 03 74 c0 01 add 0x1(%rax,%rax,8),%esi
4: 10 05 03 74 b8 01 adc %al,0x1b87403(%rip) # 0x1b8740d
a: 10 06 adc %al,(%rsi)
c: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi
10: 10 07 adc %al,(%rdi)
12: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi
16: 10 08 adc %cl,(%rax)
18: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi
1c: 00 00 add %al,(%rax)
1e: 00 00 add %al,(%rax)
20: 00 51 52 add %dl,0x52(%rcx)
23: 55 push %rbp
24: 89 e5 mov %esp,%ebp
26: 0f 34 sysenter
28: cd 80 int $0x80
* 2a: 5d pop %rbp <-- trapping instruction
2b: 5a pop %rdx
2c: 59 pop %rcx
2d: c3 retq
2e: 90 nop
2f: 90 nop
30: 90 nop
31: 90 nop
32: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi
39: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi